Brand visual identities are successful when all the pieces that make up the brand work well together. It starts with a logo. Then adding in letter heads etc. Showing where the logo would be on an ad poster (different sizes of ad posters). It can also include t-shirt designs and packaging.
What I think I would like to include in my final designs (so that I can create a successful brand identity).
– Logo – Letterheads (etc) – Poster ad layout – T-shirt design – Packaging – Website Mock up – Channel idents.